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        classDiagram
          class Ancestor {
            attr : str
            cls_member
            get_value()
            set_value(value)
          }
          class CustomException {
          }
          class DoNothing {
          }
          class DoNothing2 {
          }
          class DoSomething {
            my_int : Optional[int]
            my_int_2 : Optional[int]
            my_string : str
            do_it(new_int: int) int
          }
          class Interface {
            get_value()*
            set_value(value)*
          }
          class NullablePatterns {
            return_nullable_1()* int | None
            return_nullable_2()* Optional[int]
          }
          class PropertyPatterns {
            prop1
            prop2
          }
          class Specialization {
            TYPE : str
            relation
            relation2
            top : str
            from_value(value: int)
            increment_value() None
            transform_value(value: int) int
          }
          Specialization --|> Ancestor
          DoNothing --* Ancestor : cls_member
          DoNothing --* Specialization : relation
          DoNothing2 --o Specialization : relation2
  
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